{"id":"DEBIAN-CVE-2025-38400","details":"In the Linux kernel, the following vulnerability has been resolved:  nfs: Clean up /proc/net/rpc/nfs when nfs_fs_proc_net_init() fails.  syzbot reported a warning below [1] following a fault injection in nfs_fs_proc_net_init(). [0]  When nfs_fs_proc_net_init() fails, /proc/net/rpc/nfs is not removed.  Later, rpc_proc_exit() tries to remove /proc/net/rpc, and the warning is logged as the directory is not empty.  Let's handle the error of nfs_fs_proc_net_init() properly.  [0]: FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 0 CPU: 1 UID: 0 PID: 6120 Comm: syz.2.27 Not tainted 6.16.0-rc1-syzkaller-00010-g2c4a1f3fe03e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace:  \u003cTASK\u003e   dump_stack_lvl (lib/dump_stack.c:123)  should_fail_ex (lib/fault-inject.c:73 lib/fault-inject.c:174)  should_failslab (mm/failslab.c:46)  kmem_cache_alloc_noprof (mm/slub.c:4178 mm/slub.c:4204)  __proc_create (fs/proc/generic.c:427)  proc_create_reg (fs/proc/generic.c:554)  proc_create_net_data (fs/proc/proc_net.c:120)  nfs_fs_proc_net_init (fs/nfs/client.c:1409)  nfs_net_init (fs/nfs/inode.c:2600)  ops_init (net/core/net_namespace.c:138)  setup_net (net/core/net_namespace.c:443)  copy_net_ns (net/core/net_namespace.c:576)  create_new_namespaces (kernel/nsproxy.c:110)  unshare_nsproxy_namespaces (kernel/nsproxy.c:218 (discriminator 4))  ksys_unshare (kernel/fork.c:3123)  __x64_sys_unshare (kernel/fork.c:3190)  do_syscall_64 (arch/x86/entry/syscall_64.c:63 arch/x86/entry/syscall_64.c:94)  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)  \u003c/TASK\u003e  [1]: remove_proc_entry: removing non-empty directory 'net/rpc', leaking at least 'nfs'  WARNING: CPU: 1 PID: 6120 at fs/proc/generic.c:727 remove_proc_entry+0x45e/0x530 fs/proc/generic.c:727 Modules linked in: CPU: 1 UID: 0 PID: 6120 Comm: syz.2.27 Not tainted 6.16.0-rc1-syzkaller-00010-g2c4a1f3fe03e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025  RIP: 0010:remove_proc_entry+0x45e/0x530 fs/proc/generic.c:727 Code: 3c 02 00 0f 85 85 00 00 00 48 8b 93 d8 00 00 00 4d 89 f0 4c 89 e9 48 c7 c6 40 ba a2 8b 48 c7 c7 60 b9 a2 8b e8 33 81 1d ff 90 \u003c0f\u003e 0b 90 90 e9 5f fe ff ff e8 04 69 5e ff 90 48 b8 00 00 00 00 00 RSP: 0018:ffffc90003637b08 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff88805f534140 RCX: ffffffff817a92c8 RDX: ffff88807da99e00 RSI: ffffffff817a92d5 RDI: 0000000000000001 RBP: ffff888033431ac0 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: ffff888033431a00 R13: ffff888033431ae4 R14: ffff888033184724 R15: dffffc0000000000 FS:  0000555580328500(0000) GS:ffff888124a62000(0000) knlGS:0000000000000000 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f71733743e0 CR3: 000000007f618000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace:  \u003cTASK\u003e   sunrpc_exit_net+0x46/0x90 net/sunrpc/sunrpc_syms.c:76   ops_exit_list net/core/net_namespace.c:200 [inline]   ops_undo_list+0x2eb/0xab0 net/core/net_namespace.c:253   setup_net+0x2e1/0x510 net/core/net_namespace.c:457   copy_net_ns+0x2a6/0x5f0 net/core/net_namespace.c:574   create_new_namespaces+0x3ea/0xa90 kernel/nsproxy.c:110   unshare_nsproxy_namespaces+0xc0/0x1f0 kernel/nsproxy.c:218   ksys_unshare+0x45b/0xa40 kernel/fork.c:3121   __do_sys_unshare kernel/fork.c:3192 [inline]   __se_sys_unshare kernel/fork.c:3190 [inline]   __x64_sys_unshare+0x31/0x40 kernel/fork.c:3190   do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]   do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94  entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa1a6b8e929 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c ---truncated---","modified":"2026-09-01T16:06:14.424657785Z","published":"2025-07-25T13:15:29.533Z","upstream":["CVE-2025-38400"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2025-38400"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.147-1"}]}],"versions":["6.1.106-1","6.1.106-2","6.1.106-3","6.1.112-1","6.1.115-1","6.1.119-1","6.1.123-1","6.1.124-1","6.1.128-1","6.1.129-1","6.1.133-1","6.1.135-1","6.1.137-1","6.1.139-1","6.1.140-1","6.1.27-1","6.1.37-1","6.1.38-1","6.1.38-2","6.1.38-2~bpo11+1","6.1.38-3","6.1.38-4","6.1.38-4~bpo11+1","6.1.52-1","6.1.55-1","6.1.55-1~bpo11+1","6.1.64-1","6.1.66-1","6.1.67-1","6.1.69-1","6.1.69-1~bpo11+1","6.1.76-1","6.1.76-1~bpo11+1","6.1.82-1","6.1.85-1","6.1.90-1","6.1.90-1~bpo11+1","6.1.94-1","6.1.94-1~bpo11+1","6.1.98-1","6.1.99-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-38400.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.37-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-38400.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.37-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2025-38400.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}